Razor blade sharpener



' Sept. 22, 1936. w w. SKERRY RAZOR BLADE SHARPENER Filed Jul 5, 1935 INVENTOR WALTER W420 Ski/an; BY Z 5 g ATTORNEY Patented Sept. 22, 1936 UNITED. STATES PATENT OFFICE"- 3 Claims.

This invention relates to new and useful im: provements in a razor blade sharpener.

The invention has for an object the construction of a device as mentioned which is characterized by a casing having an opening in one side through which a slide may be extended, and upon which a razor blade may be secured, an arrangement wherein the slide may be pushed back into the casing, and mechanism operatable to cause the sharpening of the blade.

More particularly, it is proposed to have the mechanism spring operated with a winding stem on the outside of the casing.

Still further it is proposed to characterize the mechanism by superimposed pairs of spaced sharpening rollers, and a mechanism for oscillating the blade so that it comes in contact with the sharpening rollers. 1

Another object of the invention is the construction of a device as mentioned which is simple 'and durable and which may be manufactured and sold at a reasonable cost. h

For further comprehension of the invention, and of the objects and advantages thereof, reference will be had to the following description and accompanying drawing, and to the appended claims in which the various novel features of the invention are more particularly set forth.

In the accompanying'drawing forming a material part of this disclosurez- Fig. 1 is a perspective view of a razor blade sharpener constructedaccording to this invention.

Fig. 2 is a transverse sectional view as thoug taken on the line 2-2 of Fig. 3.. h

Fig. 3 is a sectional view taken on the line 3-3 of Fig. 2.

Fig. 4 is a fragmentary sectional view taken on the line 4-4 of Fig. 3. v

Fig. 5 is a sectional view of the device. v V

The razor blade sharpener, according to this invention, includes a casing l0 substantially of clock shape and formed with a side opening Ill through which a slide I I is extendable. A razor blade I2 is adapted to be mounted upon this slide so that when the slide is moved to its retracted position the blade is within the casing. The slide II is mounted upon a pivoted carriage 13. A pintle pin 14 serves to pivotally connect the carriage I3 upon a bracket 15 attached on the side of the casing.

Four parallel sharpening rollers arranged in superimposed pairs I6 and16 spaced from each other are associated witha spring motor to cause the spring motor of their rotation and thus their operative sharpening condition. .The blade I2 is adapted to be engaged against the sides of these rollers as here inafter more fully explained.

The spring motor'comprises a hollow drum I! having one side open and rotatively supported coaxially on its closed side by a stud I8 upon the casing. II]. A disc l9 closes the open side of the drum 11, A spring 20 is housed within the drum and has'its outer end attached upon the drum, and its inner end attached upon a coaxial winding stem 2|. This winding stem is equipped with a bevel gear 22 which meshes with a bevel gear 23 upon a stem 24 which projects to the exterior of the casing. A wing headed member 25 is secured upon the outer end of the stem 24 by which the spring motor may be wound. During the process of winding the device the resilient arm 40 must be in an operative position to hold the drum H in an inoperative position.

The drum I1, is formed with a flange llf upon which there are gear teeth 26. These gear teeth mesh with gears 21 rotatively supported and coaxially connected with pinions 28, which in turn mesh with gears 29 upon one of the axle'sof each of the pairs of sharpening rollers. The gears 29 mesh with gears 30 on the other of the sharpening rollers. The arrangement is such that when the drum l I rotates each pair of sharpening rollers will be rotated.

A mechanism is provided for operating the carriage to lightly engage the edges of the blade against the sharpening rollers. This mechanism consists of a pinion 3! also meshing with the gear teethg26 and fixed uponna rotatively supported shaft 32 which is equipped with a toothed wheel 33. The carriage l3 has a downward projecting stem l3 which engages the teeth of the wheel 33. The pintle I4 is engaged through the stem l3 for the pivotal supporting of the carriage. A spring 34 acts between the stem I3 and the casing Hi to normally pivot the carriage in one direction. When the toothed wheel 33 turns each tooth will pivot the carriagefor a short distance in the other direction. When' this particular tooth releases the stem 13, the spring 34 will draw. the stem back to its original position and thus the carriage is caused to oscillate.

The slide II is adapted to support the blade l2 and has several headed screws 36 engaged through openings in the blade for fixedly mounting the blade on the slide; At: the inner end the slide H has outwardly projecting arms 31 which support members 38 adapted to engage in between the pairs of the rollers when the slide is moved into the extended position so as to center the blade l2 between the pairs of rollers and prevent the blade from cutting the rollers during the motion of the slide in and out from the easing. As shown in Fig. 2, the slide H is slightly extended to illustrate the members 38 between the sharpening rollers so that the blade [2 is out of contact with the rollers.

A mechanism is provided for normally latching the spring ;motoragainst operation. 'This mechanism consists of an arm 40 attached at one end 4| upon the casing on the side opposed to the opening Ill and extending substantially to the vicinity of the opening ID. This arm 40 has sevweral branch fingers such as upwardly projecting fingers 42 which normally engage therteeth -of gears 43 coaxially fixed on the lowermost rollers of each pair of rollers. against rotation. p

A branch arm 44 from the arm 40 extends through' a vertical-S10E45 in the casing and the extended endhas a head-46 'b'yflwhich it' may be moved. when the "head 46 is moved downwards along the slot the arni'Ml-will be fiexed and the fingers 'j lfwill'bemoved out of 'conta'ctwith the gears' l3 to release the spring motor. The slot 45 has transverse branches 45' and "45 at the top and bottom, respectively, into which the branch 44 automaticallyltends to engage due to its resiliencyfls'o'that thearm lflwill be lockedin one or theother position. I

means is alsoprovidedfor preventing/the release of the" springmotor whenthe' slide I I is extended and'for latching the slide in its retracted position 'wlienthe spring motor is released. This means consists I in several additional branch fingers 49 from the arm 40 and'having'down-tumed en s (seeFig. 3) which are adapted to 'engage'in transversely elongated openings 50 in the slide. It is only in the retracted position'of the slide that the openings are in the proper positions'to receivethe ends of the branches'49. 'Whenthe slide'isextende'd'it is impossible to move' the arm 4fldownwards because of the branches 49. Thus, thespring m'otor must remain inoperative. Itis onlywhen the slide is retracted that the arm 4'9 maybe m'oved downward. Then the slide is l'o'cked'in the retracted position and the spring meter--15 freed to operate.

The operation of the spring moto consists in th'firllln" l Tlotatin'g' and the teeth 25 transmittingits' rotation to thegeafS I and the pinions '21. The"pinions serve to transmit the rotations of the"fdruin to the train, of gea'rsjwhich rotate the Sharpening fele'rn'ents Therg'ear'f3 I transmits the rotationi'ofthedrum l'Tto-foscillate'the' carriage I13. One'cyc'le of oscillation of thecarriage co'n-' in the carriage ivotin'gin one 'direction'so that i the blade engages the lowermost "roller of one of the pairs 'of "rollers, and simultaneously, the upp'ermost'roller of 'thefotherof the'pairs of ron rsj Then, -as the carriage pivotsnrtnee po'sitddileoti'oll th'bla'd Will figlg'tfie 1ower-, mostirol'ler' of the 1atter=mentionedpairbf rollers', and the up erm roller ofthe'first menboth edges andb'ofth sidesofth'e edges ofthe'bladeare sharpened.

It is to be understoodthat'the size and shape oft'hfe device may be ch'an'gdas desired and'tliat the'strobpingirollers may be. of any suitable materialand construction. I M i wnue I'h'aiie illustrated and 'desclibedtlie' pref rerrea embodimentfoff'rfiy inven'tion, 'it"is 'toib'e Thusftlidrdllers are held 'follers, a slide extendably mounted on the carriage and from the casing and adapted to hold a razor "blade with itsedges engageable against said rollz--1ersduring --.the retracted position of the slide while the slide oscillates, a spring mechanism nor- 'mallyh'eld inoperative and adapted to rotate said rollers,'oscillating means for the carriage connected withv said spring mechanism, a resilient arm supported on the casing and having branches engaging elements of thespring operated motor to hormallylrol'd the'moto-rin aninoperative positi'ony means for latching the carriage in a retractedpositionand simultaneously flexing said arm for releasing'the spring motor mechanism said means for latching the carriage including fingers from'said armeng'ageable' in aligned openings in theslidein theretra'cted position thereof, said aligned openings being elongated so as not to interferewith' the oscillation of the carriage.

"2;In'a razor blade sharpener, four parallel sharpening rollers arranged in superimposed pairs spaced from each other and rotative within a casing having a slot' therein, a pivoted carriage between said pairs of rollers, a slide extendably mounted "on the carriage'and from the casing and adapted to hold a razor blade with its edges n'gag'e'able against said rollers during the retractedposition of the slide While the carriage oscillates, a spring mechanism adapted to rotate said rollers, oscillating "means for the carriage connected with said spring mechanism, gears on thejen'd of one of said pairs'of rollers, and a resilient arm supported on the casing and having branchesengaging the teeth of said gear to normally'holdthe motor in aninoperative position, and a branch arm engaging said slot aridniou'nted on 'saidres ilientarin tocontrol the operation of said arm. I

BiIn-araz' r blade sharpener, four parallel sharpening rollers arranged "in superimposed pairs spaced from each other and rotative. within acasingliavi'rig -afslottherein, a pivoted carriage between said pairsof rollers, a slide extendably mounted "on the carriage'aridfrom'the casing and adapted to hold a razor blade with itsedges en ageable "against said 'r'ollers during the retracted position of the .slide'while the carriage oscillates,as'pririgmechanism adapted to rotate said rollers, oscillating meansfor; the carriage cofinctedw ithsaid spring mechanism, gears on theendbfoiie of saidlpairs o-f rollers, and a resilient unsupported on't'he casing and having branches efigagin'gthe teeth of said gear to nor manyheldfthe motor in 'aninoperative position, a'ii branch arm engaging said slot and mounted on d'resilie'rit aim to controlthe operation of said" arm, said .means' for latching the carriage irieiudiiignng'er's from said am engageable in alignd'openings in the slide in theretracted position thereof. r V f WALTERWARDSKERRY. 

